SGER: Low-Loss Waveguides in Barium Borate for Application in Quantum Cryptography

PIs提出在高能He离子注入硼酸钡（BBO）中研究波导的形成。这种材料被认为是通过自发参量下转换产生纠缠光子的最佳选择。我们的技术将成为创造纠缠光子集成光源的基础。这些来源将在量子信息的新领域中找到应用，包括量子密码学，量子计算，量子隐形传态和量子密集编码。所有目前可用的方案，以产生纠缠光子使用体非线性晶体。BBO波导的可用性有望实现鲁棒和高效集成光学器件的开发。

0335309AvrutskyThe PIs propose to study waveguide formation in high energy He ion-implanted barium borate (BBO). This material is known to be the best choice for generation of entangled photons through spontaneous parametric down-conversion. Our technology will become a basis for creating an integrated optical source of entangled photons. Such sources will find applications in the new field of quantum information, which includes quantum cryptography, quantum computing, quantum teleportation, and quantum dense coding. All currently available schemes for the generation of entangled photons use bulk nonlinear crystals. Availability of BBO waveguides is expected to enable development of robust and efficient integrated optical devices.